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  <div id="layout-content"><div id="function.gettimeofday" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">gettimeofday</h1>
  <p class="verinfo">(PHP 4, PHP 5, PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">gettimeofday</span> &mdash; <span class="dc-title">取得当前时间</span></p>

 </div>

 <div class="refsect1 description" id="refsect1-function.gettimeofday-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>gettimeofday</strong></span>(<span class="methodparam"><span class="type">bool</span> <code class="parameter">$as_float</code><span class="initializer"> = <strong><code>false</code></strong></span></span>): <span class="type"><span class="type">array</span>|<span class="type">float</span></span></div>

  <p class="para rdfs-comment">
   本函数是 gettimeofday(2) 的接口。返回一个关联数组，包含有系统调用返回的数据。
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.gettimeofday-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>
    
     <dt>
<code class="parameter">as_float</code></dt>

     <dd>

      <p class="para">
        当其设为 <strong><code>true</code></strong> 时，会返回浮点数而不是数组。
      </p>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.gettimeofday-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   默认返回 <span class="type">array</span>。如果设置了 <code class="parameter">as_float</code>
   则会返回 <span class="type">float</span>。
  </p>
  <p class="para">
   数组中的键为：
   <ul class="itemizedlist">
    <li class="listitem">
     <span class="simpara">
      &quot;sec&quot; - 自 Unix 纪元起的秒数
     </span>
    </li>
    <li class="listitem">
     <span class="simpara">
      &quot;usec&quot; - 微秒数
     </span>
    </li>
    <li class="listitem">
     <span class="simpara">
      &quot;minuteswest&quot; - 格林威治向西的分钟数
     </span>
    </li>
    <li class="listitem">
     <span class="simpara">
      &quot;dsttime&quot; - 夏令时修正的类型
     </span>
    </li>
   </ul>
  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-function.gettimeofday-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-2095">
    <p><strong>示例 #1 <span class="function"><strong>gettimeofday()</strong></span> 例子</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">gettimeofday</span><span style="color: #007700">());<br /><br />echo&nbsp;</span><span style="color: #0000BB">gettimeofday</span><span style="color: #007700">(</span><span style="color: #0000BB">true</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

    <div class="example-contents"><p>以上例程的输出类似于：</p></div>
    <div class="example-contents screen">
<div class="cdata"><pre>
Array
(
    [sec] =&gt; 1073504408
    [usec] =&gt; 238215
    [minuteswest] =&gt; 0
    [dsttime] =&gt; 1
)

1073504408.23910
</pre></div>
    </div>
   </div>
  </p>
 </div>

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